I'm trying to control Ardour with TouchOSC. TouchOSC always outputs OSC messages followed by a space and then a value.

example
/ardour/transport_stop 0

Ardour only wants to see
/ardour/transport_stop

How can I strip that trailing value in Pure Data?
I've only just started playing with PD so detailed info would be handy. I currently have this set up.

import mrpeach

udpreceive 3819
|
unpackOSC
|
print

This obviously prints the messages coming in on port 3819 and is working nicely.
I'd like to check if the message begins with /ardour then strip the trailing value and resend the message out another port.

I'm pretty sure I can figure out the resending, I just don't know how to manipulate the message.

Thanks for any help!

Try just running it through [$1(:

[unpackOSC]
|
[$1(
|
[print]

$1 is a variable that gets filled with the first element of a list.

thanks for the quick reply!

for this message
/ardour/transport_stop 0
it prints 0

for this message
/ardour/transport_stop 1
it prints 1

One inelegant solution would be to use routeOSC to determine which command came in and then compose the correct one to send. But that doesn't scale well and limits the usefulness of my patch.

This does work but is not what I want as it only supports two commands.

http://www.pdpatchrepo.info/hurleur/Selection_003.png

Okay, try this:

[unpackOSC]
|

|
[$1(
|
[print]

But if you're looking to also send Ardour messages that do have values, [routeOSC] might be the best way to do it, anyway.

Maelstorm, your last suggestion does what I want. Only some of the OSC commands for ardour actually use an argument, so what I'm doing is using routeOSC to catch those and handle them separately. All other commands run through my filter which strips the argument and sends it on its way.

You've gotten me well on my way. Thanks for your help!

I'll try to post my patch when it is done

you can find my patch in the patch~ forum